Dear PWSCF users,<br>
I have just begun to use ultrasoft
pseudopotentials (uspp). There are two energy cutoffs in PWSCF code.
One is ecutwfc and the other is ecutrho. By default, ecutrho =
4*ecutwfc. However, it is said that for uspp, ecutrho should be larger
than default value. So how large an ecutrho shall I set with respect to
ecutwfc? Five times or eight times?<br>
The elements I am now calculating are O, Al, Sr, Ti and La.<br>
Thank you very much for your advice.<br>
<br>
Hanghui<br>
Department of Physics<br>
Yale University<br>